This build uses 600/Smite to farm the Cathedral of Flames in Hard Mode

600 Tank

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Optional slot should be:

Light of Deldrimor for finding Hidden Treasures. Sympathetic Visage to counter knockdowns from Enchanted Hammers. "I Am Unstoppable!" to counter knockdowns and remove Crippled from yourself. Keep in mind that it gives an armor boost and reduces the amount of damage enemies take when used in combat. "Finish Him!" to take out bosses and Crypt Banshees quicker. Arcane Echo can be used to keep Spell Breaker up more than long enough for each group.

Equipment

Full Survivor and Vitae runes

Armor with lowest possible AR (Starter armor if possible).

Any weapon with a 20% longer enchantment mod such as a Totem Axe.

A Divine Favor offhand with HSR (20%).

Usage

Cast and maintain Blessed Aura and Essence Bond on yourself.

Have the smiter cast and maintain Vital Blessing, Balthazar's Spirit, Retribution and Holy Wrath on you.

Before walking into a group of enemies, cast Protective Spirit and Spirit Bond followed by Spell Breaker

As soon as you aggro, cast Shield of Absorption.

Cast Spirit Bond to keep your health up and maintain Shield of Absorption.

Keep Mantra of Resolve up against undead and enchanted groups.

Monk Smiter

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Equipment

Players should bring a superior Smiting and Protection runes on separate headsets and switch between them.

Make sure Retribution is cast before Holy Wrath. Otherwise you will take much more damage from Reversal of Damage.

Use Purge Signet after battles to remove Crippled from the 600 monk.

Use Blessed Signet for casting Unyielding Aura and Blood Ritual.

Use Blood Ritual if the 600 monk is low on energy.

Use Unyielding Aura to resurrect the monk.

Dungeon Guide:

Level 1:

Kill the group closest to you without aggroing the patrol that patrols behind it.

Take a left.

There will either be a Charr Axemaster or a Charr Blademaster that will die relatively quickly.

Normally, there will be a group of 3-4 charr that will patrol away from you and get killed by a group of 5 undead at the end of the passage. If this doesn't happen, kill the charr as they come back along their patrol pattern. Treat them like undead in terms of skill usage, except for one detail - Charr Dominators have Power Block, so if any are still alive when Spell Breaker ends, just use Spirit Bond to stay alive.

Proceed to the end of the corridor and kill the undead there.

There will then be a group of undead patrolling east-west along a corridor and a group of charr patrolling north-south. Kill the undead without aggroing the charr and continue down that corridor.

At the end of the corridor, there will be a group of patrolling undead that should be killed.

Do not continue into the big hall area, but instead turn left and move towards the dungeon lock.

There will be a group of allied charr that will turn into enemies as you approach.

If you are carrying Arcane Echo, now would be the first time you would use it to echo Spell Breaker. Continue as you would any other group. If you are not carrying Arcane Echo or "Finish Him!, spell breaker will end before the boss is dead. Spam Spirit Bond so he shatters it instead of Protective Spirit.

Pick up the dungeon key and use it to open the dungeon lock.

There will be a group that runs toward you when you enter the hallway. You can aggro this one alone or take the patrolling group as well.

There will be two groups of patrolling undead in the next area, you can kill them separately or at the same time.

The Keeper is easy to kill. You won't need Spell Breaker for him.

Run through the portal, ignoring the two spawns after the Keeper is dead.

Level 2:

Kill the lone Charr Axemaster or Charr Blademaster if it spawns, the undead may kill it though.

Kill the two groups of undead that are patrolling around a stalactite.

Move towards the area map and the charr that are guarding it, but do not aggro them.

Move by the charr and kill the first group of enchanted.

Enter the area with poison geysers and kill the next group of patrolling enchanted.

A group of undead will spawn in the center, so preprot before running in and cast Spell Breaker when you see them spawn.

Continue on the kill the third and final group of enchanted in the area.

There will be another lone Charr Axemaster or Charr Blademaster that will probably get killed by undead if you wait long enough, but if it doesn't, kill it.

Up ahead there will be a group of undead and charr. They will usually fight and the undead will win. Otherwise take out each group.

Head up the hill and kill Tyndir Flamecaller and his group. As before, he won't die before Spell Breaker ends.

Open the gate and kill the group of undead that rush at you. Cast Spell Breaker before the boss dies.

Continue the next two groups of undead, if you have Spell Breaker up thanks to the boss, feel free to aggro both groups while keeping Spell Breaker up.

Avoid the enchanted group and kill The Master.

Proceed into level 3.

Level 3:

Upon entering the area, you will see a Keymaster of Murakai. Ignore it.

There will be two groups of undead patrolling to your left. Kill the one that patrols along where the Keymaster of Murakai goes.

Follow the Keymaster of Murakai until you get to a group of undead, which you will then kill. If you cannot see the Keymaster of Murakai, move in the direction it was going until you get to the area with the enchanted. Before entering the enchanted area, take a right down the corridor.

After killing the group, loop around the lava river and kill the Keymaster of Murakai along with a group of undead. Pick up the Dungeon Key.

Turn around and take a right through the arc, and head straight, killing the group of undead. Continue down that passage.

You will see a group of patrolling enchanted, it will be faster to kill them rather than wait to pass. As you continue down the corridor, there will be a large group of enchanted. If you have trouble with this part, pull the Enchanted Hammers and Enchanted Daggers around the corner before killing the rest of the group.

Open the dungeon lock and you will enter a large and seemingly empty room.

Preprot before running in. Cast Spell Breaker when you see enemies spawn. Now aggro the Steward of Murakai and pull him away from the rest of the group. Now kill him and grab the key.

Head down the stairs where the enchanted were and through the tunnel on the left. There will be a group of undead here and at the opening of the other end of the cave to kill.

At the flame darts, maintain Spirit Bond and stand in the middle of the darts. Flag your hero to the top of the steps and follow him. Maintain Spirit Bond and Shield of Absorption on him.

Open the boss lock with your key and head through.

You will now be in Murakai's chamber.

Head up the left side and kill the two groups of undead.

Preprot and cast Spell Breaker before aggroing Murakai. Pull Murakai into the nearby flame jet near the center of the room. The easiest way to do this is to hug the wall as you move back, moving a few steps at a time. Maintain Protective Spirit, Spirit Bond, and Spell Breaker. Watch when Murakai uses Murakai's Consumption, if she uses it just before Spell Breaker ends, you can wait approximately 10 seconds before casting Spell Breaker again.

When Murakai is dead, collect the chest reward and kill the other two groups of undead if you want.